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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T30 (MH9) Or 6T40 (MH8) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0658 or P0659: Actuator High Control Circuit Group 1 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
    NOTE: You must perform Circuit/System Verification  first.
  2. Verify the Q8 Control Solenoid Valve Assembly is not contaminated with any debris. Refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If contaminated 

      Repair as necessary.

    • If not contaminated 
  3. Verify the resistance is within the specified range for each solenoid listed in the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If the resistance is not within range 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If the resistance is within range 
  4. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
  5. Connect the DT-48616-10  adapter harness between the vehicle harness connector and the Q8 Control Solenoid Valve Assembly connector. Ignition ON.
  6. Command the High Side Driver 1 ON with a scan tool.
  7. Verify the scan tool High Side Driver 1 parameter displays On.
    • If On is not displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If On is displayed 
  8. Verify the scan tool parameters listed below do not display Malfunction:
    • High Side Driver 1 Circuit Low Voltage Test Status
    • High Side Driver 1 Circuit Open Test Status
    • High Side Driver 1 Circuit High Voltage Test Status
    • If Malfunction is displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If Malfunction is not displayed 
  9. All OK.
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